The BP Better Messages WordPress plugin before 1.9.9.41 sanitise (with sanitize_text_field) but does not escape the 'subject' parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting issue

The BP Better Messages WordPress plugin before 1.9.9.41 does not check for CSRF in multiple of its AJAX actions: bp_better_messages_leave_chat, bp_better_messages_join_chat, bp_messages_leave_thread, bp_messages_mute_thread, bp_messages_unmute_thread, bp_better_messages_add_user_to_thread, bp_better_messages_exclude_user_from_thread. This could allow attackers to make logged in users do unwanted actions

Cross-Site Request Forgery (CSRF) vulnerability in WordPlus Better Messages plugin <= 1.9.9.148 at WordPress allows attackers to upload files. File attachment to messages must be activated.

Authenticated (subscriber+) Denial Of Service (DoS) vulnerability in WordPlus WordPress Better Messages plugin <= 1.9.10.57 at WordPress.

Cross-Site Request Forgery (CSRF) vulnerability in WordPlus Better Messages plugin <= 1.9.9.148 at WordPress.

Auth. (subscriber+) Messaging Block Bypass vulnerability in Better Messages plugin <= 1.9.10.69 on WordPress.

Auth. (subscriber+) Server-Side Request Forgery (SSRF) vulnerability in Better Messages plugin 1.9.10.68 on WordPress.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WordPlus Better Messages – Live Chat for WordPress, BuddyPress, PeepSo, Ultimate Member, BuddyBoss allows Stored XSS.This issue affects Better Messages – Live Chat for WordPress, BuddyPress, PeepSo, Ultimate Member, BuddyBoss: from n/a through 2.4.0.

The Better Messages – Live Chat for WordPress, BuddyPress, PeepSo, Ultimate Member, BuddyBoss plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.6.9 via the 'bp-better-messages' directory. This makes it possible for unauthenticated attackers to extract sensitive data stored insecurely in the /wp-content/uploads/bp-better-messages directory which can contain file attachments included in chat messages.

The Better Messages – Live Chat for WordPress, BuddyPress, PeepSo, Ultimate Member, BuddyBoss plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'better_messages_live_chat_button' shortcode in all versions up to, and including, 2.6.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Better Messages – Live Chat for WordPress, BuddyPress, PeepSo, Ultimate Member, BuddyBoss plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.7.4 via the 'nice_links'. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services. Successful exploitation requires the "Enable link previews" to be enabled (default).